I don't think Crypto currency will be affected by the economic crash. If there is an effect, that would be that people will pull out their investments on the stock market and place them on Crypto currency. But I don't think crypto currency will come out unscathed if ever the economy crashes. I don't know how but it will.
unfortunately many investors only know about cryptocurrency, but few are aware of the prospect of crypto later and they remain loyal to investments that have been regulated by government.